<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<h1>注册页面</h1>
<form action="" enctype="multipart/form-data" >
<input type="text" name="username" placeholder="用户名">
<input type="text" name="password" placeholder="密码">
<input type="text" name="nick" placeholder="昵称">
<input type="file" name="picFile">
<input type="button" value="注册" @click="reg()">
</form>
<!--引入vue-->
<script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
<!--引入axios-->
<script src="https://cdn.bootcdn.net/ajax/libs/axios/0.21.1/axios.min.js"></script>
<script>
    let vm=new Vue({
        el:"form",
        data:{},
        methods:{
            reg:function () {
                let data=
                    new FormData
                    (document.querySelector("form"));
                //得到上传的文件对象
                let file=data.get("picFile");
                //如果没有选择图片则不能注册
                if (file.name==""){
                    alert("请选择上传的图片文件!")
                    return;
                }

                axios.post("/reg",data).then(function (response) {
                    if (response.data==1){
                        alert("注册成功!");
                        location.href="/";
                    }else {
                        alert("用户名已存在!")
                    }

                })
            }
        }
    })
</script>
</body>
</html>